Lessonia flavicans extract |

Last updated: 05/02/2025
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(Not known by any other names) |
The following alerts are based on the data in the tables below. An absence of an alert does not imply the substance has no implications for human health, biodiversity or the environment but just that we do not have the data to form a judgement.
Environmental fate |
Ecotoxicity |
Human health |
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An extract produced from a brown seaweed used as a biostimulant to promote plant growth |
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Growth; Vigour; Stress |
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A brown macroalgae with potential as a biostimulant to promote stress tolerance |
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Lessonia flavicans has not been extensively studied as a biostimulant. However, it has been shown to help alleviate salt stress in wheat seedlings and to significantly increase soil activity of invertase, urease, proteinase, and phosphatase enzymes in replant soil used with crabapple seedlings. |
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Novel |
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Native to the Pacific Ocean and found along coast lines of South America, New Zealand and Tasmania |
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Once harvested from the sea, the seaweed is cleaned and dried. The bioactive compounds are then extracted using either water, an organic solvent or an enzymatic process is used. The extract is then concentrated, purified and formulated into the end product |
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Not approved |
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Not applicable |
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No UK approval for use as a pesticide |
EC Regulation 1107/2009 (repealing 91/414) |
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Not approved |
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Not applicable |
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Not applicable |
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Not applicable |
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No |
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ATAustria |
BEBelgium |
BGBulgaria |
CYCyprus |
CZCzech Republic |
DEGermany |
DKDenmark |
EEEstonia |
ELGreece |
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ESSpain |
FIFinland |
FRFrance |
HRCroatia |
HUHungary |
IEIreland |
ITItaly |
LTLithuania |
LULuxembourg |
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LVLatvia |
MTMalta |
NLNetherlands |
PLPoland |
PTPortugal |
RORomania |
SESweden |
SISlovenia |
SKSlovakia |
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Not applicable |
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No |
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Other substance |
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Biostimulant - growth enhancement & improved abiotic stress resiliance |
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Plant-derived substance; Marine algae-based biostimulant |
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Class: Phaeophyceae; Order: Laminariales; Family: Lessoniaceae |
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May contain heavy metals |
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Natural |
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The extract is rich in bioactive compounds (e.g. minerals, secondary metabolites, growth-promoting hormones, vitamins, polysaccharides and other bioactive compounds) stimulates plant growth, modulates different physiological, metabolic, and molecular processes with possible synergistic effects that increase abiotic stress tolerance. In addition, the bioactive substances can stimulate microbial activity and enhance beneficial microbial populations. |
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Lessonia flavicans extract |
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Not applicable |
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Not applicable |
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Not applicable |
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Not applicable |
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Readily biodegradable |
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As this parameter is not normally measured directly, a surrogate measure is used: ‘Photochemical oxidative DT₅₀’. Where data is available, this can be found in the Fate Indices section below. |
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Soil adsorption and mobility |
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Cannot be calculated |
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None
Terrestrial ecotoxicology |
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HUMAN HEALTH AND PROTECTION |
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EU MRL pesticide database |
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Carcinogen |
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Endocrine disruptor |
XNo, known not to cause a problem |
A0 A = Chromosome aberration (EFSA database) 0 = No data ; B0 B = DNA damage/repair (EFSA database) 0 = No data ; C0 C = Gene mutation (EFSA database) 0 = No data ; D0 D = Genome mutation (EFSA database) 0 = No data ; E0 E = Unspecified genotoxicity type (miscellaneous data source) 0 = No data |
XNo, known not to cause a problem |
Reproduction / development effects |
Acetyl cholinesterase inhibitor |
Neurotoxicant |
XNo, known not to cause a problem |
XNo, known not to cause a problem |
XNo, known not to cause a problem |
Respiratory tract irritant |
Skin irritant |
Skin sensitiser |
XNo, known not to cause a problem |
XNo, known not to cause a problem |
XNo, known not to cause a problem |
Eye irritant |
Phototoxicant |
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XNo, known not to cause a problem |
XNo, known not to cause a problem |
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Studies show antimicrobial and antioxidant properties |
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No information available |
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Not regulated |
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Lessonia flavicans extract |
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Record last updated: |
05/02/2025 |
Contact: |
aeru@herts.ac.uk |
Please cite as: |
Lewis, K.A., Tzilivakis, J., Warner, D. and Green, A. (2016) An international database for pesticide risk assessments and management. Human and Ecological Risk Assessment: An International Journal, 22(4), 1050-1064. DOI: 10.1080/10807039.2015.1133242 |